This record comprises nine datasets related to the South Georgia and the South Sandwich Islands (SGSSI) Marine Protected Area (MPA) review undertaken in 2019. The SGSSI MPA is one of the world's largest MPAs, and the 2019 review led to a significant extension of the MPA area to cover all of the SGSSI Maritime Zone totalling 1.24 million km2. Details of the new measures can be found within the legislation (SG Gazette No 1. Dated 31 January 2019: https://laws.gov.gs/gazettes), and the datasets here relate directly to these measures. The following datasets are published here, for which further information can be found in the legislation linked above: -The boundary of the SGSSI MPA/Maritime Zone -No Take Zones for South Georgia -No Take Zones for Clerke and Shag rocks -No Take Zones for South Sandwich Islands -No Take Zones for South Sandwich Islands trench -No Take Zones for South of 60degS -Benthic Closed Areas -Pelagic Closed Areas -Heavy Fuel Oil Prohibition line The datasets are available as shapefiles. This work has been funded directly by the Government of South Georgia and the South Sandwich Islands.

Water column acoustic data collected in the Atlantic Ocean (from 2014-09-27 to 2014-11-02) during cruise JR303. Multi-frequency (38,120 and 200 kHz) acoustic data were collected using a Simrad EK60 echo sounder. The dataset comprises of calibrated and processed 38 kHz volume backscattering strength (Sv, dB re 1m-1). Data processing was undertaken using Echoview and Matlab. Processed netCDF data files are made available as part of the NERC Southern Ocean Network of Acoustics (SONA) and the EU MESOPP project.

Water column acoustic data collected in the Atlantic Ocean (from 2015-09-17 to 2015-11-03) during cruise JR15001. Multi-frequency (38,120 and 200 kHz) acoustic data were collected using a Simrad EK60 echo sounder. The dataset comprises of calibrated and processed 38 kHz volume backscattering strength (Sv, dB re 1m-1). Data processing was undertaken using Echoview and Matlab. Processed netCDF data files are made available as part of the NERC Southern Ocean Network of Acoustics (SONA) and the EU MESOPP project.

Water column acoustic data collected in the Atlantic Ocean (from 2016-09-26 to 2016-11-03) during cruise JR16001. Multi-frequency (38,120 and 200 kHz) acoustic data were collected using a Simrad EK60 echo sounder. The dataset comprises of calibrated and processed 38 kHz volume backscattering strength (Sv, dB re 1m-1). Data processing was undertaken using Echoview and Matlab. Processed netCDF data files are made available as part of the NERC Southern Ocean Network of Acoustics (SONA) and the EU MESOPP project.

This record comprises six datasets related to the South Georgia and the South Sandwich Islands (SGSSI) Marine Protected Area (MPA) review undertaken in 2025. The SGSSI MPA is one of the world's largest MPAs, and in April 2025 the area of the MPA in which fishing is prohibited was greatly expanded following the second five-year MPA review in 2024. Details of the new measures can be found within the latest legislation (SGSSI Gazette No 2 dated 22 April 2025: https://laws.gov.gs/gazettes/), and the datasets here relate directly to the areas and boundaries referred to in these measures. These datasets are: -The boundary of the SGSSI MPA -No Take Zones -General Benthic Closed Areas -Research Benthic Closed Areas -Pelagic Closed Areas -General Fisheries Zones The datasets are available as shapefiles. This work has been funded directly by the Government of South Georgia and the South Sandwich Islands with additional financial support from the UK Government Blue Belt programme.

This dataset contains atmospheric methane and carbon dioxide concentration data in the Southern Ocean and South Atlantic Ocean, and dissolved methane concentration data from surface and water column seawater samples in the Scotia Sea, Weddell Sea, and South Georgia shelf taken onboard RRS Discovery during DY158 from December 2022 and January 2023. Atmospheric methane and carbon dioxide concentration was measured using a Los Gatos Ultraportable Greenhouse Gas Analyser (UGGA) G2311-f. The concentrations are 2 hour averaged and have been filtered based on wind direction to data corresponding to wind coming from behind the ship to remove sources of pollution from the ship stack. Surface seawater samples were taken either using the uncontaminated seawater system or from the surface sample from a CTD (Conductivity-Depth-Temperature) cast. Water column seawater samples were taken from a CTD with Niskin bottle rosette-casts at various depths spanning from the sea surface to the seafloor. The dissolved methane concentration in each seawater sample is measured using gas chromatography. Funding source: This work was supported by the Natural Environment Research Council and the ARIES Doctoral Training Partnership (grant no. NE/S007334/1). The fieldwork was supported by the Collaborative Antarctic Science Scheme (CASS).

This dataset contains sea-air methane flux data from January 2019 to March 2021 measured using a Picarro G2311-f greenhouse gas analyser onboard RRS James Clark Ross, in the Southern Ocean, Arctic Ocean and Atlantic Ocean. The fluxes are 2 hour averaged and have been filtered based on wind direction to data corresponding to wind coming from behind the ship to remove sources of pollution from the ship stack. Limit of detection for the flux data are calculated for each cruise by multiplying the standard deviation of the random noise by three. This work was supported by the Natural Environment Research Council and the ARIES Doctoral Training Partnership (grant no. NE/S007334/1). Royal Holloway, University of London was funded by NERC through grants NE/V000780/1 and NE/N016211/1. Anna E. Jones and Katrin Linse were part of the British Antarctic Survey Polar Science for Planet Earth Programme funded by the Natural Environment Research Council (NERC) [NC-Science]. The measurements from the Royal Research Ship James Clark Ross (JCR) were principally supported by the UK Natural Environment Research Council's ORCHESTRA project (Grant No. NE/N018095/1). The Picarro analyser was funded by the European Space Agency funding (ESA AMT4OceanSatFlux project, Grant No. 4000125730/18/NL/FF/gp). This work further contributes to the NERC MOYA project (Grant No. NE/N015932/1).